WO2008121818A1 - Plastic pallet with snap-pins and associated method for making the same - Google Patents

Plastic pallet with snap-pins and associated method for making the same Download PDF

Info

Publication number
WO2008121818A1
WO2008121818A1 PCT/US2008/058655 US2008058655W WO2008121818A1 WO 2008121818 A1 WO2008121818 A1 WO 2008121818A1 US 2008058655 W US2008058655 W US 2008058655W WO 2008121818 A1 WO2008121818 A1 WO 2008121818A1
Authority
WO
WIPO (PCT)
Prior art keywords
snap
pin
receiving cavity
inner sleeve
joining members
Prior art date
Application number
PCT/US2008/058655
Other languages
English (en)
French (fr)
Inventor
Vishnu Naidu
Original Assignee
Chep Technology Pty Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to CN2008800104535A priority Critical patent/CN101687569B/zh
Priority to AU2008232684A priority patent/AU2008232684B2/en
Priority to CA2682536A priority patent/CA2682536C/en
Priority to DK08732982.7T priority patent/DK2129586T3/da
Priority to KR1020097020237A priority patent/KR101186069B1/ko
Priority to ES08732982T priority patent/ES2390799T3/es
Application filed by Chep Technology Pty Limited filed Critical Chep Technology Pty Limited
Priority to EP08732982A priority patent/EP2129586B1/en
Priority to JP2010501257A priority patent/JP4981166B2/ja
Priority to NZ579864A priority patent/NZ579864A/en
Priority to MX2009010466A priority patent/MX2009010466A/es
Publication of WO2008121818A1 publication Critical patent/WO2008121818A1/en
Priority to HK10105984.5A priority patent/HK1139906A1/xx

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D19/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
    • B65D19/0004—Rigid pallets without side walls
    • B65D19/0006—Rigid pallets without side walls the load supporting surface being made of a single element
    • B65D19/003—Rigid pallets without side walls the load supporting surface being made of a single element forming discontinuous or non-planar contact surfaces
    • B65D19/0032—Rigid pallets without side walls the load supporting surface being made of a single element forming discontinuous or non-planar contact surfaces the base surface being made of a single element
    • B65D19/0036—Rigid pallets without side walls the load supporting surface being made of a single element forming discontinuous or non-planar contact surfaces the base surface being made of a single element forming discontinuous or non-planar contact surfaces
    • B65D19/0038—Rigid pallets without side walls the load supporting surface being made of a single element forming discontinuous or non-planar contact surfaces the base surface being made of a single element forming discontinuous or non-planar contact surfaces and each contact surface having a stringer-like shape
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D19/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16B—DEVICES FOR FASTENING OR SECURING CONSTRUCTIONAL ELEMENTS OR MACHINE PARTS TOGETHER, e.g. NAILS, BOLTS, CIRCLIPS, CLAMPS, CLIPS OR WEDGES; JOINTS OR JOINTING
    • F16B21/00—Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it; Stud-and-socket releasable fastenings
    • F16B21/06—Releasable fastening devices with snap-action
    • F16B21/08—Releasable fastening devices with snap-action in which the stud, pin, or spigot has a resilient part
    • F16B21/086—Releasable fastening devices with snap-action in which the stud, pin, or spigot has a resilient part the shank of the stud, pin or spigot having elevations, ribs, fins or prongs intended for deformation or tilting predominantly in a direction perpendicular to the direction of insertion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2519/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
    • B65D2519/00004—Details relating to pallets
    • B65D2519/00009—Materials
    • B65D2519/00014—Materials for the load supporting surface
    • B65D2519/00034—Plastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2519/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
    • B65D2519/00004—Details relating to pallets
    • B65D2519/00009—Materials
    • B65D2519/00049—Materials for the base surface
    • B65D2519/00069—Plastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2519/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
    • B65D2519/00004—Details relating to pallets
    • B65D2519/00009—Materials
    • B65D2519/00084—Materials for the non-integral separating spacer
    • B65D2519/00104—Plastic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2519/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
    • B65D2519/00004—Details relating to pallets
    • B65D2519/00009—Materials
    • B65D2519/00119—Materials for the construction of the reinforcements
    • B65D2519/00129—Metal
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2519/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
    • B65D2519/00004—Details relating to pallets
    • B65D2519/00258—Overall construction
    • B65D2519/00263—Overall construction of the pallet
    • B65D2519/00273—Overall construction of the pallet made of more than one piece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2519/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
    • B65D2519/00004—Details relating to pallets
    • B65D2519/00258—Overall construction
    • B65D2519/00283—Overall construction of the load supporting surface
    • B65D2519/00288—Overall construction of the load supporting surface made of one piece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2519/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
    • B65D2519/00004—Details relating to pallets
    • B65D2519/00258—Overall construction
    • B65D2519/00313—Overall construction of the base surface
    • B65D2519/00328—Overall construction of the base surface shape of the contact surface of the base
    • B65D2519/00348—Overall construction of the base surface shape of the contact surface of the base contact surface of other form
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2519/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
    • B65D2519/00004—Details relating to pallets
    • B65D2519/00258—Overall construction
    • B65D2519/00398—Overall construction reinforcements
    • B65D2519/00432—Non-integral, e.g. inserts
    • B65D2519/00437—Non-integral, e.g. inserts on the load supporting surface
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2519/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
    • B65D2519/00004—Details relating to pallets
    • B65D2519/00547—Connections
    • B65D2519/00552—Structures connecting the constitutive elements of the pallet to each other, i.e. load supporting surface, base surface and/or separate spacer
    • B65D2519/00557—Structures connecting the constitutive elements of the pallet to each other, i.e. load supporting surface, base surface and/or separate spacer without separate auxiliary elements
    • B65D2519/00567—Structures connecting the constitutive elements of the pallet to each other, i.e. load supporting surface, base surface and/or separate spacer without separate auxiliary elements mechanical connection, e.g. snap-fitted
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2519/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
    • B65D2519/00004—Details relating to pallets
    • B65D2519/00547—Connections
    • B65D2519/00552—Structures connecting the constitutive elements of the pallet to each other, i.e. load supporting surface, base surface and/or separate spacer
    • B65D2519/00572—Structures connecting the constitutive elements of the pallet to each other, i.e. load supporting surface, base surface and/or separate spacer with separate auxiliary element, e.g. screws, nails, bayonets
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D2519/00—Pallets or like platforms, with or without side walls, for supporting loads to be lifted or lowered
    • B65D2519/00004—Details relating to pallets
    • B65D2519/00736—Details
    • B65D2519/00825—Finishing of the external surfaces
    • B65D2519/0083—Anti-slip means
    • B65D2519/0084—Separated elements, e.g. including in-moulded elements
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
    • Y02W30/00—Technologies for solid waste management
    • Y02W30/50—Reuse, recycling or recovery technologies
    • Y02W30/80—Packaging reuse or recycling, e.g. of multilayer packaging
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T24/00—Buckles, buttons, clasps, etc.
    • Y10T24/42—Independent, headed, aperture pass-through fastener
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49826—Assembling or joining
    • Y10T29/49947—Assembling or joining by applying separate fastener
    • Y10T29/49954—Fastener deformed after application
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/53—Means to assemble or disassemble

Definitions

  • the present invention relates to the field of pallets useful in material handling, and more particularly, to a multi-piece plastic pallet designed for use with forklift equipment.
  • Pallets are customarily used to transport and store goods.
  • a pallet typically includes an upper deck and a lower deck separated by support blocks.
  • Pallets have traditionally been formed of wood. While advantageous in terms of cost, wood pallets have many disadvantages. For example, they are subject to breakage and are therefore reusable only over a short period of time. Wooden pallets are also difficult to maintain in a sanitary condition, thereby limiting their usability in applications where sanitation is important, such as in food handling applications.
  • Plastic pallets can easily be molded and are stronger and lighter weight than wooden pallets. They can also be made with recyclable materials. Furthermore, plastic pallets are more durable than wooden pallets.
  • plastic pallets come into repeated contact with the sharp metal tines of a forklift, which is also referred to as a pallet jack.
  • the support blocks separating the upper and lower decks are subjected to the most intense wear of any part on the pallet.
  • the tines of a pallet jack are inserted too far between the upper and lower decks such that the wheels of the pallet jack are resting on the lower deck, then the upper deck becomes separated from the lower deck when the tines of the pallet jack are lifted.
  • the resulting damage from the upper deck being separated from the lower deck requires the upper deck to be replaced, and if the damage is too extensive, then the entire pallet is replaced.
  • U.S. Patent No. 5,413,052 discloses a plastic pallet having an upper deck and a lower deck, with replaceable support blocks therebetween.
  • the support blocks include octagonal posts having support member walls positioned beneath reinforced portions of the upper deck.
  • the posts also have a sleeve with a central bolt hole parallel to the support member walls.
  • the lower deck receives the support blocks in recessed pockets.
  • Plastic bolts are inserted through the upper deck, each post, and the lower deck.
  • Plastic T-nuts are used for holding the bolts in place.
  • a plastic pallet includes identical upper and lower decks interconnected by support blocks.
  • Each support block includes a central core and a surrounding sleeve interconnected by spokes.
  • the core has flexible tabs that extend beyond opposite ends of the sleeve and lock onto the base and cargo layers.
  • the plastic pallet disclosed in U.S. Patent No. 5,791,261 also discloses the use of flexible tabs for holding the base and cargo layers together.
  • the plastic pallet comprises support blocks between the upper and lower decks, and upper and lower snap-lock elements extend from the respective upper and lower decks through the support blocks for inter-locking with one another.
  • an object of the present invention is to reduce or limit damage to plastic pallets caused by a forklift or other lifting devices.
  • a plastic pallet comprising an upper deck including snap-pin openings, and first joining members that project downwardly from the upper deck, with each first joining member including an outer sleeve surrounding a respective snap- pin opening.
  • the pallet may further comprises a lower deck, and second joining members that project upwardly from the lower deck, with each second joining member including an inner sleeve and a snap-pin receiving cavity positioned therein.
  • the inner sleeves of the second joining members may receive the outer sleeves of the first joining members to define support blocks joining the upper and lower decks.
  • Each support block may include rounded edges.
  • Snap-pins may be inserted into the snap-pin openings in the upper deck.
  • Each snap-pin may comprise a head for engaging a snap- pin opening and spaced apart tips that extend through the snap-pin receiving cavity for engaging a backside of the inner sleeve associated therewith.
  • Each snap-pin may further comprise a body coupled between the head and the spaced apart tips. The spaced apart tips may resilie ⁇ tly extend outwards from the body after having passed through the snap-pin receiving cavity for engaging the backside of the inner sleeve associated therewith.
  • each snap-pin may be angled to facilitate insertion thereof through the snap-pin receiving cavity.
  • the spaced apart tips of each snap-pin may comprise a respective lip for engaging the backside of the inner sleeve.
  • the respective lips of each snap-pin may be configured to break off based on a separation force applied between the upper and lower decks.
  • Each second joining member may further comprise ribs extending between the inner sleeve and the snap-pin receiving cavity positioned therein.
  • the ribs may radially extend along a length of the inner sleeve and along a length of the snap-pin receiving cavity.
  • the method may comprise positioning the inner sleeves of the second joining members for receiving the outer sleeves of the first joining members to define a plurality of support blocks joining the upper and lower decks.
  • Snap-pins may be inserted into the snap-in openings in the upper deck.
  • Each snap-pin may comprise a head for engaging a snap- pin opening, and spaced apart tips that extend through the snap-pin receiving cavity for engaging a backside of the inner sleeve associated therewith.
  • FIG. 1 is a top perspective view of an assembled pallet in accordance with the present invention.
  • FIG. 2 is a bottom perspective view of the pallet shown in FIG. 1.
  • FIG. 3 is a bottom perspective view of the upper deck of the pallet shown in FIG. 1.
  • FIG. 4 is a top perspective view of the lower deck of the pallet shown in FIG. 1.
  • FIG. 5 is a perspective view of a snap-pin used within each support block in accordance with the present invention.
  • FIG. 6 is a top view of the snap-pin shown in FIG. 5.
  • FIG. 7 is a partial cross-sectional side view of a pallet illustrating a snap-pin within a support block in accordance with the present invention.
  • FIGS. 1-4 illustrate top and bottom perspective views of a pallet 10 having upper and lower decks 12, 14 that are held together using snap-pins 16.
  • the upper deck 12 is also known as the cargo layer
  • the lower deck 14 is also known as the base layer.
  • the upper deck 12 includes a plurality of first joining members that project downwardly from the upper deck, with each first joining member including an outer sleeve 40.
  • the lower deck 14 includes a plurality of second joining members that project upwardly from the lower deck, with each second joining member including an inner sleeve 42.
  • the inner sleeves 42 of the second joining members receive the outer sleeves 40 of the first joining members to define support blocks 18, 18a joining the upper and lower decks 12, 14.
  • the support blocks 18, 18a define a space 20 between the upper and lower decks 12, 14 for receiving at least one lifting member, such as a tine of a pallet jack.
  • An advantage of the snap-pins 16 is that they act as fusible links in the event a separation force is applied between the upper and lower decks 12, 14 of the pallet 10. This separation force may result when the wheels of the pallet jack are resting on the lower layer 14, and the tines extending from the pallet jack are lifted upwards. This causes the upper deck 12 to become separated from the support blocks 18, 18a.
  • the tabs 50 on the fusible links 16 will snap or break when the separation force becomes too excessive. Consequently, instead of replacing the entire upper deck 12, the snap-pins 16 with the broken tabs 50 are replaced.
  • the support blocks 18, 18a are formed by the outer and inner sleeves 40, 42 extending from the respective upper and lower decks 12, 14.
  • the outer and inner sleeves 40, 42 are molded as part of their respective upper and lower decks 12, 14. However, the upper and lower decks 12, 14 are separately molded.
  • the upper deck 12 includes a generally flat, planar surface having a plurality of holes 22 extending therethrough.
  • the lower deck 14 includes a generally flat, planar surface having a plurality of holes 23 extending therethrough.
  • the holes 22, 23 provide several benefits including a reduced surface area of the upper and lower decks 12, 14, increased air circulation for items placed on the upper deck, and a reduced weight of the pallet, for example.
  • An example plastic pallet with upper and lower decks is disclosed in U.S. published patent application number 2007/0256609. This patent is assigned to the current assignee of the present invention, and is incorporated herein by reference in its entirety.
  • the upper deck 12 may include an outer perimeter 24 of the planar surface that does not include any holes 12. This area may be about 3 to 5 inches wide, for example.
  • the lower deck 14 has a perimeter shape that substantially matches the perimeter shape of the upper deck 12.
  • the lower deck 14 may include a rectangular perimeter shape having cross members 26, 28 that intersect a center portion of each side of the rectangular perimeter, midway between the corners of the pallet 10.
  • the upper and lower decks 12, 14 may be molded from thermoplastic or other polymer materials, including high density polyethylene (HDPE), polypropylene (PP), among other polymer materials. As may be appreciated by those skilled in the art, the polymer materials may be filled or unfilled and/or may include particulate or fibrous, natural or synthetic materials, among other features.
  • HDPE high density polyethylene
  • PP polypropylene
  • unfilled HDPE may provide improved impact strength
  • PP having strengtheners i.e., long glass fibers
  • unfilled PP with random copolymers may provide improved reinforcement qualities.
  • the upper and lower decks 12, 14 may be molded from different thermoplastics or polymer materials.
  • the upper deck 12 may be molded from a first type of thermoplastic or polymer material, while the lower deck 12 may be molded from a second type of thermoplastic or polymer material.
  • all or a portion of the upper and lower decks 12, 14 may be constructed from materials other than plastic, such as wood and/or metal, for example.
  • the illustrated pallet 10 is substantially square-shaped.
  • An example size of the pallet 10 is 48 inches by 48 inches, for example. As readily appreciated by those skilled in the art, the pallet 10 may also be formed with other rectangular shapes, such as 40 inches by 48 inches, for example.
  • the pallet 10 may include rounded corners/edges 30 along the perimeter thereof. Rounded corners/edges 30 help to reduce and/or deflect damage during impact with the tines of a forklift, as well as providing an improved aesthetic appearance.
  • the illustrated pallet 10 includes a plurality of support blocks 18, 18a that are provided to join the upper and lower decks 12, 14 together as well as providing separation so that the tines of a pallet jack can be inserted therebetween.
  • the illustrated pallet 10 includes nine support blocks 18, 18a that are located at the corners of the pallet, as well as between the corners of the pallet along the outer edges of the pallet.
  • a support block 18a is also provided in a center of the pallet 10 at the intersection of cross members 26, 28 in the lower deck 14.
  • Each support block 18, 18a is defined by an outer sleeve 40 projecting downwardly from the upper deck 12 and an inner sleeve 42 projecting upwardly from the lower deck 14.
  • the outer and inner sleeves 40, 42 are molded with their respective upper and lower decks 12, 14.
  • the outer and inner sleeves 40, 42 are sized so that they overlap one another when joined together.
  • the shapes of the outer and inner sleeves 40, 42 are not limited to any particular shape.
  • the outer and inner sleeves 40, 42 may be square-shaped, triangular-shaped, oval-shaped or cross-shaped, for example. The edges of the outer sleeves 40 may be rounded.
  • the upper deck 12 includes a plurality of snap-pin openings for receiving the snap-pins 16. Each outer sleeve 40 surrounds a respective snap-pin opening.
  • the lower deck 14 includes a snap-pin receiving cavity 44 positioned within each inner sleeve 42. A plurality of radial ribs 43 extending between the snap-pin receiving cavity 44 and the inner sleeve 42.
  • An advantage of the support blocks 18, 18a is that the impact energy from contact with the tines of the forklift can be dissipated among the following elements: the outer sleeve 40, the inner sleeve 42, the radial ribs 43 and the cylindrical core defined by the snap-pin receiving cavity 44 in the inner sleeve.
  • the fork tines strike the outer sleeve 40 first, which absorbs most of the impact energy.
  • the impact energy may then be transmitted to the inner sleeve 42, which also absorbs some of the impact energy. More absorption of the impact energy takes place at the radial ribs 43. The remaining impact energy reaches the snap-pin receiving cavity 44 for dissipation.
  • Each snap-pin 16 includes a head 46, a body 48 and spaced apart tips 50, as best illustrated in FIG. 5.
  • the head 46 is for engaging a snap-pin opening in the upper deck 12.
  • the head 46 of each snap-pin 16 may be shaped to include spaced apart straight edges 49, as illustrated in FIG. 6.
  • Each snap-pin opening in the upper deck 12 is correspondingly shaped the same. This helps to hold the snap-pins 16 in place.
  • the snap- pins 16 are typically inserted into the pallet 10 after the upper and lower decks 12, 14 have been joined together to form the support blocks 18, 18a.
  • the spaced apart tips 50 extend through the snap-pin receiving cavity 44 for engaging a backside 60 of the inner sleeve, as best illustrated in FIG. 7.
  • the snap-pin receiving cavity 44 does not extend all the way from the top of the inner sleeve 42 to the bottom of the lower deck 14. This is to allow room for the tabs 50 on the snap-pin 16 to clear and engage the backside 60 of the inner sleeve 42.
  • the snap-pins 16 are positioned accordingly for illustration purposes. As illustrated in FIG. 3, the snap-pins 16 extend within and past the outer sleeves 40. As illustrated in FIG. 4, the heads 46 of the snap-pins 16 are raised above the inner sleeve 42 and the snap-pin receiving cavities 44 without the lower deck 14 in place. This allows clearance for the head 46 of each snap-pin 16 to engage a snap-pin opening in the upper deck 12, while the spaced apart tips 50 extend through the snap-pin receiving cavity 44 for engaging a backside 60 of the inner sleeve 42 associated therewith.
  • each snap-pin 16 resiliently extend outwards from the body 48 after having passed through the snap- pin receiving cavity 44 for engaging the backside 60 of the inner sleeve 42 associated therewith.
  • the spaced apart tips 50 of each snap-pin 16 may be angled to facilitate insertion thereof through the snap-pin receiving cavity 44.
  • the spaced apart tips 50 of each snap-pin comprise a respective lip 51 for engaging the backside of the inner sleeve.
  • the respective lips 51 are configured to break off based on an excessive separation force applied between the upper and lower decks 12, 14.
  • the snap-pins 16 are also formed out of plastic. Alternatively, the snap-pins 16 may be formed out any of the materials used to form the upper and lower decks 12, 14 as discussed in detail above.
  • Another aspect is directed to a method for making a pallet 10 as described above.
  • the method comprises positioning the inner sleeves 42 of the plurality of second joining members for receiving the outer sleeves 40 of the plurality of first joining members to define a plurality of support blocks 18, 18a joining the upper and lower decks 12, 14.
  • a plurality of snap-pins 16 is inserted into the plurality of snap-in openings in the upper deck 12.
  • Each snap-pin 16 comprises a head 46 for engaging a snap-pin opening 44 and spaced apart tips 50 that extend through the snap-pin receiving cavity 44 for engaging a backside 60 of the inner sleeve 42 associated therewith.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Pallets (AREA)
PCT/US2008/058655 2007-03-30 2008-03-28 Plastic pallet with snap-pins and associated method for making the same WO2008121818A1 (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
AU2008232684A AU2008232684B2 (en) 2007-03-30 2008-03-28 Plastic pallet with snap-pins and associated method for making the same
CA2682536A CA2682536C (en) 2007-03-30 2008-03-28 Plastic pallet with snap-pins and associated method for making the same
DK08732982.7T DK2129586T3 (da) 2007-03-30 2008-03-28 Plastpalle med snaptapper og tilhørende fremgangsmåde til fremstilling af samme
KR1020097020237A KR101186069B1 (ko) 2007-03-30 2008-03-28 스냅 핀을 갖는 플라스틱 팔레트 및 이를 제조하는 관련 방법
ES08732982T ES2390799T3 (es) 2007-03-30 2008-03-28 Pallet de plástico con pasador de agarre a presión y método asociado de fabricación del mismo
CN2008800104535A CN101687569B (zh) 2007-03-30 2008-03-28 具有咬梢的塑料托盘及其制造方法
EP08732982A EP2129586B1 (en) 2007-03-30 2008-03-28 Plastic pallet with snap-pins and associated method for making the same
JP2010501257A JP4981166B2 (ja) 2007-03-30 2008-03-28 スナップピンを備えたプラスチックパレットおよびそれを製造するための関連方法
NZ579864A NZ579864A (en) 2007-03-30 2008-03-28 Plastic pallet assembly having upper and lower decks each with integrally moulded joining members
MX2009010466A MX2009010466A (es) 2007-03-30 2008-03-28 Tarima de plastico con espigas de ajuste a presion y metodo asociado para producir la misma.
HK10105984.5A HK1139906A1 (en) 2007-03-30 2010-06-15 Plastic pallet with snap-pins and associated method for making the same

Applications Claiming Priority (4)

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US90909407P 2007-03-30 2007-03-30
US60/909,094 2007-03-30
US12/056,663 US8006629B2 (en) 2007-03-30 2008-03-27 Plastic pallet with snap-pins and associated method for making the same
US12/056,663 2008-03-27

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PCT/US2008/058664 WO2008121823A1 (en) 2007-03-30 2008-03-28 Plastic pallet with sleeved reinforcing rods and associated method for making the same

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EP (2) EP2129587B1 (xx)
JP (3) JP5102348B2 (xx)
KR (2) KR101186027B1 (xx)
CN (3) CN102295092B (xx)
AU (2) AU2008232611B2 (xx)
CA (2) CA2682536C (xx)
DK (1) DK2129586T3 (xx)
ES (2) ES2585131T3 (xx)
HK (2) HK1139906A1 (xx)
MX (3) MX2009010466A (xx)
MY (2) MY163838A (xx)
NZ (2) NZ579864A (xx)
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ZA200907595B (en) 2010-07-28
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US8141500B2 (en) 2012-03-27
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EP2129587A1 (en) 2009-12-09
CA2682536C (en) 2013-01-15
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